High Speed Machining is a Cut Pattern available within the 2½ Axis and some 3 Axis and 4 Axis operations. It reduces tool pressure and keeps chip load more consistent. It is especially valuable when cutting harder materials and generally results in much better tool life, when compared to traditional milling cut patterns. The cut pattern is characterized by progressive arc-shaped passes that nibble away at the remaining material.
An example of the High Speed Cut Pattern in 2½ Axis Pocketing is shown below:  2½ Axis Pocketing with High Speed Cut Pattern |